21022124 has 6 divisors (see below), whose sum is σ = 36788724. Its totient is φ = 10511060.

The previous prime is 21022117. The next prime is 21022163. The reversal of 21022124 is 42122012.

It is a junction number, because it is equal to n+sod(n) for n = 21022099 and 21022108.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2627762 + ... + 2627769.

It is an arithmetic number, because the mean of its divisors is an integer number (6131454).

Almost surely, 2^21022124 is an apocalyptic number.

It is an amenable number.

21022124 is a deficient number, since it is larger than the sum of its proper divisors (15766600).

21022124 is a wasteful number, since it uses less digits than its factorization.

21022124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255535 (or 5255533 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 21022124 is about 4584.9889858101. The cubic root of 21022124 is about 275.9892700442.

Adding to 21022124 its reverse (42122012), we get a palindrome (63144136).

The spelling of 21022124 in words is "twenty-one million, twenty-two thousand, one hundred twenty-four".